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INTEGRATED PEST MANAGEMENT FOR CRANBERRIES IN WESTERN CANADA A GUIDE TO IDENTIFICATION, MONITORING AND DECISION-MAKING FOR PESTS AND DISEASES Céline Maurice Caroline Bédard Sheila M. Fitzpatrick Jim Troubridge Deborah Henderson December, 2000 About the authors: Céline Maurice was employed by Agriculture and Agri-Food Canada at the Pacific Agri-Food Research Centre (AAFC - PARC), Agassiz, BC, in 2000. Caroline Bédard (M.P.M.) worked under contract to the B.C. Cranberry Growers Association in 1999. Sheila Fitzpatrick (Ph.D.) is a research scientist and Jim Troubridge (B. Sc.) a technician with AAFC - PARC. Deborah Henderson (Ph. D.) is president of E.S. Cropconsult, Ltd. This is Technical Report #163 Agriculture and Agri-Food Canada Pacific Agrifood Research Centre P.O. Box 1000 Agassiz, BC, Canada V0M 1A0 Where to get this manual: A limited number of copies are available from Dr. S. M. Fitzpatrick Agriculture and Agri-Food Canada Pacific Agri-Food Research Centre P.O. Box 1000 Agassiz, BC, Canada V0M 1A0 [email protected] The electronic version can be found at: http://res2.agr.ca/parc-crapac/english/3electronic_publications/e_pubs.htm Funding for this manual was obtained from: Agriculture and Agri-Food Canada B.C. Cranberry Growers Association Cranberry Institute Investment Agriculture Foundation 3M Canada Company Ocean Spray Cranberries, Inc. 2 TABLE OF CONTENTS FOREWORD ... ................................... 4 ACKNOWLEDGEMENTS ................................. 5 INTEGRATED PEST MANAGEMENT (IPM) ....................... 7 MONITORING ................................. 8 USING PHEROMONE TRAPS ........................... 10 INSECT CLASSIFICATION .......................... 12 INSECT LIFE CYCLES ............................. 13 KEY TO CATERPILLARS FOUND IN B.C. CRANBERRY BEDS .................................... 17 KEY PESTS: DORMANT TO PRE-BLOOM ...................... 18 KEY PESTS: BLOOM AND FRUIT SIZING TO HARVEST .. ............ 32 MONITORING PERIODS FOR PESTS OF CRANBERRIES (TABLE) ................................ 41 POLLINATORS AND THEIR PROTECTION ...................... 42 NATURAL ENEMIES OF PESTS .......................... 49 NATURAL ENEMIES OF WEEDS ......................... 61 DISEASES ................................ 62 INFECTION PERIOD AND OCCURRENCE OF THE DISEASES (TABLE) ........ 69 IPM RESOURCES .............................. 70 WEBSITES ............................... 72 REFERENCES .............................. 76 REGISTERED PEST CONTROL PRODUCTS FOR CRANBERRY PESTS (TABLE) ..... 77 CANADA CRANBERRY PESTICIDE CHART . ................... 79 3 FOREWORD This manual is a reference tool designed to help cranberry growers and pest management consultants with identification, monitoring and control of key pests and diseases in cultivated cranberry fields in Western Canada. The manual begins with several short sections explaining integrated pest management (IPM), monitoring, use of pheromone traps, insect classification and life cycles, and identification of moth larvae (caterpillars). Following these introductory explanations are two sections describing key insect pests. The first section presents pests found during the dormant to pre-bloom stages of cranberry vines in early spring. Pests found during the summer stages of bloom and fruit sizing are described in the second section. In each section, the most common pests are presented by usual order of prevalence in cranberry beds. Less common pests are also described, because you may see them when monitoring fields. For all pests, a description of the life cycle and feeding habits is provided so that you may better understand pest biology. Details on methods and timing of monitoring for major pests will help you detect these pests in cranberry beds. Not all insects and animals in cranberry beds are pests. Sections on pollinators and on natural enemies of insects and weeds will help you identify, encourage and protect the “good guys”. Symptoms of the most common fungal diseases seen in this region, along with the causal organisms, are presented in the section on diseases. A table demonstrating the infection periods and the timing of disease in the beds will help growers detect and manage blights, diebacks and rots. Because the concepts of integrated pest management are based on economical and environmental aspects, special emphasis has been placed on presenting biological, behavioural, physical and cultural practices for controlling pests and protecting against diseases. General recommendations for chemical control of insects are suggested. The 2000 Canada Cranberry Pesticide Chart and a table of products registered by the Canadian Pest Management Regulatory Agency (PMRA) are included to help growers choose appropriate insecticides. We emphasize that insecticide, fungicide and herbicide registrations change from year to year. Always read the label carefully to ensure that the chemicals you choose are registered on cranberry for the target pest, be it an insect, a disease or a weed. The information contained in this manual was compiled from many sources, including research reports, field observations, scientific articles, books, and extension guides and manuals. A list of references, good websites and IPM resources is provided if you desire more information. We hope that this manual will assist all concerned users and will facilitate your pest management techniques and practices. 4 ACKNOWLEDGEMENTS The authors of this manual wish to thank the following people for photos, advice, information, review, comments, insect identification, and for sharing their knowledge. Their input has made a great contribution to this document. Valerie Behan-Pelletier, Ph.D. AAFC, Eastern Cereal and Oilseed Research Centre, Ottawa, ON. Jon Bell Canadian Food Inspection Agency, New Westminster, BC. Pete Bristow, Ph.D. Washington State University, Puyallup, WA, U.S.A. Ursula Dole Greenbug Biological Pest Control, Inc., Vancouver, BC. Jere Downing, Ph.D. The Cranberry Institute, Wareham, MA, U.S.A. Mark Gardiner, M.P.M. AAFC Pacific Agri-Food Research Centre, Summerland, BC. David R Gillespie, Ph.D. AAFC Pacific Agri-Food Research Centre, Agassiz, BC. Eric Lagasa, Ph.D. Washington State Department of Agriculture, Olympia, WA, U.S.A. Jean-François Landry, Ph.D. AAFC, Eastern Cereal and Oilseed Research Centre, Ottawa, ON. Shiyou Li, Ph.D. Natural Resources Canada, Atlantic Forestry Centre, Cornerbrook, NF. Kenna MacKenzie, Ph.D. AAFC, Atlantic Food & Horticulture Research Centre, Kentville, NS. 5 Steve Marshall, Ph.D. Department of Environmental Biology, University of Guelph, Guelph, ON. Richard Martin, M. Sc. and Krista Apse, B.A. Pest Management Regulatory Agency, Ottawa, ON. Brian E. Mauza, M.P.M. Ocean Spray Cranberries, Inc., Richmond, BC. Jeff Miller, Ph.D Oregon State University, Corvallis, OR, U.S.A. Kim D. Patten, Ph.D. Washington State University, Long Beach, WA, U.S.A. A special thanks to Geoff Menzies, M.P.M., and Craig MacConnell, Ph.D., Washington State University Cooperative Extension, Whatcom County, for inspiration in the design of this manual. 6 INTEGRATED PEST MANAGEMENT (IPM) IPM is a knowledge-based decision-making process that strives to manage crop pests in an economical, efficient, environmentally friendly manner. IPM decision-making requires understanding the pest problem, applying the economic or action thresholds for triggering pest management, knowing the risks and benefits of the various management options, and choosing the lowest risk, most efficient pest management strategy available. Inherent to the IPM Stratedy are: 1. The concept of monitoring the pest population and/or factors influencing the pest population so that control is used only if the pest is present at numbers to be concerned about and/or if conditions are conducive to pest reproduction and growth. 2. All appropriate methods should be used. A combination of approaches is desirable, rather than reliance on a single technique. Combinations must be economical. 3. Broad-spectrum pesticides should be avoided, with the use of selective chemicals desired. 4. The least disruptive approach is to be used. Thus, adequate controls that do not upset desirable aspects of the system will be adopted. Recognizing these principles and concepts, this IPM manual promotes the use of sound IPM strategies and techniques by cranberry growers to ensure the development of sustained cranberry production in Canada. (Exerpted from text by Jere Downing, Ph.D., Executive Director of the Cranberry Institute) 7 MONITORING Monitoring for insects is like doing detective work. “Monitoring” simply means sampling on a regular basis, usually weekly. Monitoring is recommended to find pests on cranberry and to be aware of the damage they may cause. Monitoring may be done by a paid cranberry pest management consultant, or by a farm employee trained in monitoring techniques and record-keeping. Several monitoring methods are used to find different species of pests and to gather information that will help growers decide on the type and timing of treatment. Visual sweeps, sweep-netting in the daytime or at night, walking counts, pheromone traps and light traps may be used to detect the presence and the developmental stage of insect pests in cranberry fields. Monitoring for dead pests at a safe interval after a pesticide application is recommended to check that the treatment was effective and to see if newly hatched larvae are present. In British Columbia, monitoring begins early in the spring by looking for larvae of the blackheaded fireworm.
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